00487nam a22001817a 4500 NUST - PNEC 20170116180806.0 150422b xxu||||| |||| 00| 0 eng d 8122405258 LIBRARY 363.700 VAR 2973 SarDesai, D. R Environmental challanges D. R SarDesai, New Delhi Wiley Eastern c1993. 131p. : 2974 Sustainable development General ddc BK 63188 63188 0 0 ddc 0 0 PNEC PNEC WING-A 1994-12-15 Pak Book Corporation 392.00 0 363.700 VAR PNECLIB-017767 2015-04-22 392.00 1994-12-15 BK